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If you need quality Hexagon Head Flange Bolt,you can buy it with low price from XIAOGUO. The head design of the XIAOGUO Hexagon Head Flange Bolt is hexagonal shape, and the bottom is attached with a flat flange. This structural design increases the contact area between the bolt and the tightened surface, which can disperse the pressure and reduce the damage to the substrate. It is especially suitable for soft materials or applications where indentation needs to be avoided. The presence of flanges also means that the bolts are installed without additional washers, simplifying the assembly process. Ordinary bolts: In contrast, ordinary bolts usually only include hexagonal heads or round heads, and there is no additional flange structure, so the contact area with the tightened surface is small. This may require the use of washers during installation to disperse the pressure and prevent local excessive pressure from causing material damage.